Once you’re on 10.0.5.1-H612SP1C00-Universal , follow these best practices:
Before flashing, ensure your hardware matches these specs to avoid "bricking" your device: : Balong 5000 huawei h122-373 firmware 10.0.5.1-h612sp1c00- universal
Random file hosting sites (sendspace, mediafire) – many contain modified bootloaders with backdoors. Once you’re on 10